Air quality indicator



FIG. 1 is a front elevation view of an air quality indicator showing thenew design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a front, right side, and top perspective view thereof in analternate configuration wherein the front cover is separated.

The broken lines depict portions of the air quality indicator that formno part of the claimed design.

CLAIM The ornamental design for an air quality indicator, as shown anddescribed.